Historic Intraday data

["Ron Cernokus" <roncer@xxxxxxxxxxxxx>]

I am trying to locate a source for purchasing historical intraday data.
Data that could be used to create composite charts.  The idea would be to
create composite charts for each day of the week.  George Angell in his
book, Sniper Trading, displayed days of the week composites for the S&P
going back 10 years and used intraday data.  He doesn't seem to be reachable
these days.

Any suggestions will be appreciated.

Ron